Quick Verdict
A dump truck load size in cubic yards depends on the truck and, just as often, on weight rather than volume. A standard tandem dump truck typically hauls roughly 10 to 14 cubic yards of loose material, while transfer and end-dump combos carry more, and a pickup-towed dump trailer carries only a few yards. The catch is that wet dirt, rock, and gravel are heavy, so a truck frequently hits its legal weight limit before the bed is full. In Oregon, narrow rural roads in the Gorge and Coast Range and weight limits on county roads cap how big a truck can even reach your site.
Why Cubic Yards Matter
A cubic yard is a cube three feet on each side, about the volume of a typical washing machine footprint scaled up, and it is the unit dirt, gravel, sand, and rock are sold and hauled in. Material yardage is how you count loads, budget delivery, and figure haul-off. If you know your project's volume, you can count trucks. Working out that yardage is a step covered in the excavation materials and hauling guide, and turning yards into trips is the job of how many truckloads is my project.
Truck Types and What They Carry
Not every dump truck is the same size, and the right one depends on your material, your access, and the haul distance.
| Truck Type | Typical Capacity (loose cu yd) | Best For |
|---|---|---|
| Dump trailer (towed) | 2 - 5 cu yd | Small residential loads, tight access |
| Single-axle dump truck | 5 - 8 cu yd | Small jobs, narrow driveways |
| Tandem-axle dump truck | 10 - 14 cu yd | Most residential and small commercial |
| Transfer or end-dump combo | 15 - 25+ cu yd | Big imports, long hauls on open roads |
Volume vs Legal Weight Limit
Here is the part owners miss: a dump truck is limited by how much it can legally weigh on the road, not just how much fits in the bed. Trucks have a gross vehicle weight rating and have to obey road weight limits, and heavy material maxes that out fast.
- Light material like dry wood chips or bark can fill the bed by volume before hitting the weight limit.
- Heavy material like wet soil, gravel, or rock hits the weight limit with the bed only partly full.
- The driver loads to the weight limit first, so a heaped load of rock might be the same tonnage as a barely-half load.
That is why a truck rated for 14 yards might deliver only 8 or 10 yards of crushed rock. The bed is not the limit; the scale is.
To make this concrete, here is roughly how much a single cubic yard of common Oregon materials weighs, which is what decides when a truck tops out:
| Material (per cubic yard) | Approximate weight |
|---|---|
| Dry wood chips or bark mulch | light; fills the bed before weight limits |
| Dry topsoil | roughly 1,800 - 2,200 lb |
| Wet Willamette Valley clay | often 2,800 - 3,400+ lb |
| Crushed 3/4-minus gravel | roughly 2,800 - 3,000 lb |
| Solid basalt rock | the heaviest; tops out the scale fastest |
Why Wet Dirt and Rock Max Out First
Material weight per yard varies a lot, and Oregon's wet ground makes it worse. Saturated valley clay can weigh dramatically more than the same soil dry, so winter haul-off loads carry fewer yards per trip than summer ones. Rock and gravel are dense to begin with. The heavier the material, the sooner the truck hits its weight cap, and the more trips your project takes. How much a given material weighs is the focus of how much a yard of gravel weighs, and it matters directly to your load count.
Access and Turnaround Limits in Oregon
Even when a big truck would be efficient, your site may not allow it. Narrow rural roads in the Hood River area, the Gorge, and the Coast Range, plus posted weight limits on county roads and bridges, can force a contractor to use a smaller truck and make more trips. A long, steep, or tight driveway with no turnaround is another reason a tandem stays at the road and material gets shuttled in by a smaller machine. The Oregon excavation contractor guide covers how access shapes the whole job, and access is often what makes a "simple" delivery cost more.
Planning Loads to Cut Down on Trips
Because each trip carries a cost, the number of loads is where a hauling budget is won or lost. On a job that both digs material out and brings new material in -- common on a building pad or driveway -- a smart contractor times the trucks so a load of spoil going out is followed by a load of import coming back, rather than running empty miles. That round-trip efficiency matters most on rural Oregon sites where the pit or transfer station is far from the property.
Swell is the factor that catches people off guard. Soil and rock take up more space once dug out and loosened than they did in the ground -- often 20 to 30 percent more -- so the hole you excavated yields more loose yards to haul than its in-ground volume suggests. The same effect works in reverse on imported fill, which compacts down once placed. Factoring swell into both the dig-out and the import is the difference between a load count that holds and one that runs a couple of trips over.
What a Load Typically Costs
Delivery is priced per load by truck size and distance, not as a single flat figure.
| Item | Industry Baseline Range |
|---|---|
| Dump truck haul-off or delivery, per load (10 - 14 cu yd) | $250 - $750+ per load |
| Fill dirt, delivered, per cu yd | $20 - $75+ per cu yd |
| Crushed gravel, delivered, per cu yd | $45 - $110+ per cu yd |
| Disposal or dump fee, per load | $75 - $300+ per load |
| Mobilization | $250 - $800+ flat |
Current Market Reality
Real costs often run 2 to 3 times baseline when distance to the pit or transfer station is long, the material is heavy and wet, road weight limits force smaller trucks, or both import and export loads are needed. A rural delivery often carries a minimum charge even for a partial load.
The Bottom Line
Dump truck load size is about cubic yards and weight together: the bed sets the ceiling, but heavy Oregon material and road weight limits usually set the real load. Know your material's weight and your road's limits and you can predict trips and budget honestly. Cojo is CCB Licensed and Insured and has hauled across Oregon since 2009. See our excavation services or request a free estimate.